Ferroelectric liquid crystal display device and driving system thereof for driving the display by an integrated scanning method

Abstract

A ferroelectric liquid crystal display device is disclosed, which takes a specified period to rewrite the picture elements in one horizontal scanning period, and includes M scanning lines divided into a plurality of groups each containing K scanning lines (K>1, M>1, K, M: positive integers) and elements for supplying scanning signals to the M scanning lines to rewrite an image. The scanning signal-supplying elements output scanning signals to the first scanning line of each group in the first frame, to the second scanning line of each group in the second frame, and to the Kth scanning line of each group in the Kth frame so that the M scanning lines are rewritten by K times of scanning.

What is claimed is: 
     
       1. A display device for receiving a non-interlaced image signal and displaying the received non-interlaced image signal by an interlaced scanning method, said device taking a specified period to rewrite the picture elements in one horizontal scanning period, said device comprising: a matrix type liquid crystal display panel containing a ferrodielectric liquid crystal;   M scanning lines disposed on the display panel and divided into a plurality of groups, each containing K scanning lines, wherein K and M are integers greater than 1; and   supplying means for supplying scanning signals to the M scanning lines to rewrite said non-interlaced image signal,   said supplying means including selection means for sequentially outputting K select signals, delay means for successively delaying each of the K select signals, and means for successively applying each sequentially output K select signal, successively delayed, to corresponding scanning lines of each of the plurality of groups,   whereby a scanning signal is outputted to the first scanning line of each group in the first frame, to the second scanning line of each group in the second frame, and to the Kth scanning line of each group in the Kth frame so that picture elements on the M scanning lines are rewritten by K times of scanning, thereby said received non-interlaced image signal being displayed on said display panel at a field frequency within the frame frequency K times larger than that of said received non-interlaced image signal.   
     
     
       2. The display device as claimed in claim 1, wherein the specified period required for rewritting picture elements in one horizontal scanning period is r, and the display device satisfies the condition of ##EQU4##   
     
     
       3. The display device, as claimed in claim 1, where the display device is used in a personal computer. 
     
     
       4. A display device for receiving a non-interlaced image signal and displaying the received non-interlaced image signal by an interlaced scanning method, said device comprising: a matrix type liquid crystal display panel interposing a ferroelectric liquid crystal between plural scanning electrodes and plural signal electrodes which are arranged in directions intersecting each other, the ferroelectric liquid crystal constituting picture elements at intersections of the plural scanning electrodes and the plural signal electrodes, the picture elements having memory characteristics without any active-matrix driving elements;   M scanning electrodes disposed on the display panel and divided into a plurality of groups, each containing K scanning electrodes, wherein K and M are integers greater than 1; and   supplying means for supplying scanning signals to drivers connected to the M scanning electrodes to rewrite data corresponding to said non-interlaced image signal,   said supplying means including selecting means for selecting corresponding one scanning electrode of each of said groups in a given field period, so as to select successively K scanning electrodes of each group in K successive field periods, and means for applying a selective voltage successively to a selected scanning electrode of each group and applying a non-selective voltage to non-selected scanning electrodes of each group,   whereby the selective voltage is applied to the first scanning electrode of each group in a first field period, to the second scanning electrode of each group in a second field period, and to the Kth scanning electrode of each group in a Kth field period so that picture elements on the M scanning electrodes are rewritten by a frame period which is K times larger than said field period, thereby said received non-interlaced image signal being displayed on said display panel at a field frequency which is K times larger than a frame frequency.   
     
     
       5. A display device as claimed in claim 4, wherein said selecting means includes outputting means for sequentially outputting K select signals successively delayed, and wherein said applying means includes means for successively applying each sequentially output K select signal, successively delayed, to corresponding scanning lines of each of the plurality of groups.   
     
     
       6. A display device as claimed in claim 5, wherein said outputting means includes means for sequentially outputting K select signals, and delay means for successively delaying each of the K select signals.